3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Lt1 Conversion Into 87' Z-28 Wiring Help Needed!!!!

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Old Jan 13, 2008 | 05:43 PM
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jammer94's Avatar
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Lt1 Conversion Into 87' Z-28 Wiring Help Needed!!!!

whats up guys i just finished laying the lt1 fuel injected motor into my 87 and will be using a caprice 95 lt1 engine wiring harness to power it up the car an 87' EX TPI 305 auto car had the existing harness still in it i have since however pulled out the harness and see that i will need to use the large square connector from TPI harness to splice into the caprice harness so that everything can bolt up to stock i already had the pass key programmed out of pcm and will be using the 700r4 which has already been modified in pcm as well.


i took some pics really what i am looking for is a wiring description breakdown maybe from someone who has an FSM factory service manual that can help me with this wiring.

the 1st connector shown in the picture i need to know what the cables do i know the thick yellow and pink wires have something to do with starting the car but which of these cable sends the signal for the a/c comp to turn on and which sends the signal for the elec fuel pump to turn on in the tank.

heres the pics of the wires on the plug i need identified.








heres the 2nd plug i need identified and this one goes in throught the pass side fender into the pass side inside of the car under the dash, its a white semi rectangular plug which i dont know what the cables in this plug do and need some identifing..







any help with this would be greatly apprecaited especially from any of you guys whom have done this conversion before.
Old Jan 14, 2008 | 01:48 PM
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someone....
Old Jan 14, 2008 | 06:21 PM
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Did you look at the stickly?
Old Jan 19, 2008 | 01:53 AM
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yeah but the colors above in my pics are different from the colors posted in the sticky it must be from a differentyear 3rd gen and it also says nothing about the fuel pump power signal thats why i think its for an older f-body. theres also another connector by where the original ecm was located the plug that came out of there goes into the dash what wires are in that plug under the dash? i need to know which one is for the fuel pump.and i am getting NO power at the AC blower motor power wire i need to make the AC work to.
any help would be cool
Old Jan 20, 2008 | 02:20 PM
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can anyone else help me out here with the fuel pump power wire please help i want to crank this thing.
Old Jan 21, 2008 | 02:52 PM
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This might help...

http://92b4crs.tripod.com/86wiring/86wiringindex.html
Old Jan 21, 2008 | 08:06 PM
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why is it that i went through that whole entire link and cant understand ISH why cant i just get a breakdown of the connectors i posted pics of above and where the wire comes out of there, just need to know which one comes out of the fuse block or goes to it...the connector under the dash the comes out of the same plug that goes into the ECM what comes out of that plug....

anyone anyone ...
Old Jan 23, 2008 | 07:20 AM
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ttt
Old Jan 28, 2008 | 12:57 PM
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does anyone have the schematics for a TPI car 87'''' gessh all the colors of my cables are different from the ones listed in the sticky casue its for a carbed car i think.
Old Jan 28, 2008 | 01:52 PM
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Have you looked here? The question(s) you have should be available or ask and they will be.

http://www.thirdgen.org/techboard/ltx-lsx/

If this does not help leave me a pm and I will look in my bood, 1985 but should be the same.
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